On Fri, Sep 4, 2009 at 00:33, Stefan Conrad<dr.stefan.conrad@xxxxxxxxxxx> wrote:
> I am trying to initialise a MidiSport USB interface with a udev rule
> that triggers fxload to upload the firmware:
>
> ACTION=="add", SUBSYSTEM=="usb", DEVPATH=="/*.0",
Better use KERNEL=="*.0". Matching on the DEVPATH is in most cases wrong.
> ENV{PRODUCT}=="763/1001/*", RUN+="/sbin/fxload -v -s
> /usr/local/share/usb/maudio/MidiSportLoader.ihx -I
> /usr/local/share/usb/maudio/MidiSport2x2.ihx -D $env{DEVNAME}"
>
> The problem:
> DEVNAME is not set in the environment.
The rule matches on USB devices _and_ interfaces and runs several
times. You better limit it to the device only with:
ENV{DEVTYPE}=="usb_device".
> Only DEVICE is set with the 'wrong' device file name under /proc/bus/usb
> which is deprecated and thus not useful.
There is a known timing problem with the usb device nodes, and this
should fix it:
http://git.kernel.org/?p=linux/kernel/git/gregkh/patches.git;a=blob;f=driver-core/driver-core-add-new-device-to-bus-s-list-before-probing.patch;hb=HEAD
Kay
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